along with this program. If not, see <http://www.gnu.org/licenses/>. */
#include "defs.h"
+#include "arch-utils.h"
#include "inferior.h"
#include "regcache.h"
#include "gdbcmd.h"
/* Prevent warning from -Wmissing-prototypes. */
extern void _initialize_linux_fork (void);
-int detach_fork = 1; /* Default behavior is to detach
- newly forked processes (legacy). */
-
/* Fork list data structure: */
struct fork_info
{
struct fork_info *next;
ptid_t ptid;
int num; /* Convenient handle (GDB fork id) */
- struct regcache *savedregs; /* Convenient for info fork, saves
+ struct regcache *savedregs; /* Convenient for info fork, saves
having to actually switch contexts. */
int clobber_regs; /* True if we should restore saved regs. */
- ULONGEST pc; /* PC for info fork. */
off_t *filepos; /* Set of open file descriptors' offsets. */
int maxfd;
};
/* Fork list methods: */
-extern int
+int
forks_exist_p (void)
{
return (fork_list != NULL);
}
-/* Add a fork to internal fork list.
- Called from linux child_follow_fork. */
+/* Add a fork to the internal fork list. */
-extern struct fork_info *
+struct fork_info *
add_fork (pid_t pid)
{
struct fork_info *fp;
free_fork (fp);
- /* Special case: if there is now only one process in the list,
+ /* Special case: if there is now only one process in the list,
and if it is (hopefully!) the current inferior_ptid, then
remove it, leaving the list empty -- we're now down to the
default case of debugging a single process. */
for (fp = fork_list; fp; fp = fpnext)
{
fpnext = fp->next;
- delete_inferior (ptid_get_pid (fp->ptid));
free_fork (fp);
}
/* Fork list <-> gdb interface. */
-/* Utility function for fork_load/fork_save.
+/* Utility function for fork_load/fork_save.
Calls lseek in the (current) inferior process. */
static off_t
extern void nullify_last_target_wait_ptid ();
int i;
- inferior_ptid = fp->ptid;
-
- linux_nat_switch_fork (inferior_ptid);
+ linux_nat_switch_fork (fp->ptid);
if (fp->savedregs && fp->clobber_regs)
regcache_cpy (get_current_regcache (), fp->savedregs);
registers_changed ();
reinit_frame_cache ();
- stop_pc = read_pc ();
+ stop_pc = regcache_read_pc (get_current_regcache ());
nullify_last_target_wait_ptid ();
/* Now restore the file positions of open file descriptors. */
/* Save infrun state for the fork PTID.
Exported for use by linux child_follow_fork. */
-extern void
+static void
fork_save_infrun_state (struct fork_info *fp, int clobber_regs)
{
char path[MAXPATHLEN];
fp->savedregs = regcache_dup (get_current_regcache ());
fp->clobber_regs = clobber_regs;
- fp->pc = read_pc ();
if (clobber_regs)
{
fp->maxfd = tmp;
}
/* Allocate array of file positions. */
- fp->filepos = xrealloc (fp->filepos,
+ fp->filepos = xrealloc (fp->filepos,
(fp->maxfd + 1) * sizeof (*fp->filepos));
/* Initialize to -1 (invalid). */
/* Kill 'em all, let God sort 'em out... */
-extern void
+void
linux_fork_killall (void)
{
/* Walk list and kill every pid. No need to treat the
forks to debug. Delete the exiting one and context-switch to the
first available. */
-extern void
+void
linux_fork_mourn_inferior (void)
{
/* Wait just one more time to collect the inferior's exit status.
We need to delete that one from the fork_list, and switch
to the next available fork. */
delete_fork (inferior_ptid);
- /* Delete process from GDB's inferior list. */
- delete_inferior (ptid_get_pid (inferior_ptid));
/* There should still be a fork - if there's only one left,
delete_fork won't remove it, because we haven't updated
viable forks to debug. Detach and delete it and context-switch to
the first available. */
-extern void
+void
linux_fork_detach (char *args, int from_tty)
{
/* OK, inferior_ptid is the one we are detaching from. We need to
error (_("Unable to detach %s"), target_pid_to_str (inferior_ptid));
delete_fork (inferior_ptid);
- /* Delete process from GDB's inferior list. */
- delete_inferior (ptid_get_pid (inferior_ptid));
/* There should still be a fork - if there's only one left,
delete_fork won't remove it, because we haven't updated
/* Fork list <-> user interface. */
static void
-delete_fork_command (char *args, int from_tty)
+delete_checkpoint_command (char *args, int from_tty)
{
ptid_t ptid;
if (!args || !*args)
- error (_("Requires argument (fork/checkpoint id to delete)"));
+ error (_("Requires argument (checkpoint id to delete)"));
ptid = fork_id_to_ptid (parse_and_eval_long (args));
if (ptid_equal (ptid, minus_one_ptid))
- error (_("No such fork/checkpoint id, %s"), args);
+ error (_("No such checkpoint id, %s"), args);
if (ptid_equal (ptid, inferior_ptid))
- error (_("Please switch to another fork/checkpoint before deleting the current one"));
+ error (_("\
+Please switch to another checkpoint before deleting the current one"));
if (ptrace (PTRACE_KILL, PIDGET (ptid), 0, 0))
error (_("Unable to kill pid %s"), target_pid_to_str (ptid));
printf_filtered (_("Killed %s\n"), target_pid_to_str (ptid));
delete_fork (ptid);
- /* Delete process from GDB's inferior list. */
- delete_inferior (ptid_get_pid (ptid));
}
static void
-detach_fork_command (char *args, int from_tty)
+detach_checkpoint_command (char *args, int from_tty)
{
ptid_t ptid;
if (!args || !*args)
- error (_("Requires argument (fork id to detach)"));
+ error (_("Requires argument (checkpoint id to detach)"));
ptid = fork_id_to_ptid (parse_and_eval_long (args));
if (ptid_equal (ptid, minus_one_ptid))
- error (_("No such fork id, %s"), args);
+ error (_("No such checkpoint id, %s"), args);
if (ptid_equal (ptid, inferior_ptid))
- error (_("Please switch to another fork before detaching the current one"));
+ error (_("\
+Please switch to another checkpoint before detaching the current one"));
if (ptrace (PTRACE_DETACH, PIDGET (ptid), 0, 0))
error (_("Unable to detach %s"), target_pid_to_str (ptid));
printf_filtered (_("Detached %s\n"), target_pid_to_str (ptid));
delete_fork (ptid);
- /* Delete process from GDB's process table. */
- detach_inferior (ptid_get_pid (ptid));
}
-/* Print information about currently known forks. */
+/* Print information about currently known checkpoints. */
static void
-info_forks_command (char *arg, int from_tty)
+info_checkpoints_command (char *arg, int from_tty)
{
+ struct gdbarch *gdbarch = get_current_arch ();
struct frame_info *cur_frame;
struct symtab_and_line sal;
struct symtab *cur_symtab;
if (ptid_equal (fp->ptid, inferior_ptid))
{
printf_filtered ("* ");
- pc = read_pc ();
+ pc = regcache_read_pc (get_current_regcache ());
}
else
{
printf_filtered (" ");
- pc = fp->pc;
+ pc = regcache_read_pc (fp->savedregs);
}
printf_filtered ("%d %s", fp->num, target_pid_to_str (fp->ptid));
if (fp->num == 0)
printf_filtered (_(" (main process)"));
printf_filtered (_(" at "));
- fputs_filtered (paddress (pc), gdb_stdout);
+ fputs_filtered (paddress (gdbarch, pc), gdb_stdout);
sal = find_pc_line (pc, 0);
if (sal.symtab)
if (printed == NULL)
{
if (requested > 0)
- printf_filtered (_("No fork number %d.\n"), requested);
+ printf_filtered (_("No checkpoint number %d.\n"), requested);
else
- printf_filtered (_("No forks.\n"));
+ printf_filtered (_("No checkpoints.\n"));
}
}
-/* Save/restore mode variable 'detach_fork':
- We need to temporarily take over this mode variable, while
- preserving the user-specified state, and make sure that it
- gets restored in case of error.
-
- The int pointer that we use comes from the caller, so we can
- be called more than once (even though currently we don't need to). */
-
-static void
-restore_detach_fork (void *arg)
-{
- detach_fork = *(int *) arg;
-}
+/* The PID of the process we're checkpointing. */
+static int checkpointing_pid = 0;
-static struct cleanup *
-save_detach_fork (int *saved_val)
+int
+linux_fork_checkpointing_p (int pid)
{
- *saved_val = detach_fork;
- return make_cleanup (restore_detach_fork, (void *) saved_val);
+ return (checkpointing_pid == pid);
}
static void
pid_t retpid;
struct cleanup *old_chain;
long i;
- /* Make this temp var static, 'cause it's used in the error context. */
- static int temp_detach_fork;
-
- /* Remove breakpoints, so that they are not inserted
- in the forked process. */
- remove_breakpoints ();
/* Make the inferior fork, record its (and gdb's) state. */
gdbarch = get_objfile_arch (fork_objf);
ret = value_from_longest (builtin_type (gdbarch)->builtin_int, 0);
- old_chain = save_detach_fork (&temp_detach_fork);
- detach_fork = 0;
+
+ /* Tell linux-nat.c that we're checkpointing this inferior. */
+ old_chain = make_cleanup_restore_integer (&checkpointing_pid);
+ checkpointing_pid = PIDGET (inferior_ptid);
+
ret = call_function_by_hand (fork_fn, 0, &ret);
do_cleanups (old_chain);
if (!ret) /* Probably can't happen. */
{
int parent_pid;
- printf_filtered (_("checkpoint: fork returned pid %ld.\n"),
+ printf_filtered (_("checkpoint: fork returned pid %ld.\n"),
(long) retpid);
if (info_verbose)
{
parent_pid = ptid_get_lwp (last_target_ptid);
if (parent_pid == 0)
parent_pid = ptid_get_pid (last_target_ptid);
- printf_filtered (_(" gdb says parent = %ld.\n"),
+ printf_filtered (_(" gdb says parent = %ld.\n"),
(long) parent_pid);
}
}
if (!fp)
error (_("Failed to find new fork"));
fork_save_infrun_state (fp, 1);
- insert_breakpoints ();
}
static void
fork_load_infrun_state (newfp);
insert_breakpoints ();
- printf_filtered (_("Switching to %s\n"),
+ printf_filtered (_("Switching to %s\n"),
target_pid_to_str (inferior_ptid));
print_stack_frame (get_selected_frame (NULL), 1, SRC_AND_LOC);
}
-/* Switch inferior process (fork) context, by process id. */
-static void
-process_command (char *args, int from_tty)
-{
- struct fork_info *fp;
-
- if (!args || !*args)
- error (_("Requires argument (process id to switch to)"));
-
- if ((fp = find_fork_pid (parse_and_eval_long (args))) == NULL)
- error (_("Not found: process id %s"), args);
-
- linux_fork_context (fp, from_tty);
-}
-
-/* Switch inferior process (fork) context, by fork id. */
-static void
-fork_command (char *args, int from_tty)
-{
- struct fork_info *fp;
-
- if (!args || !*args)
- error (_("Requires argument (fork id to switch to)"));
-
- if ((fp = find_fork_id (parse_and_eval_long (args))) == NULL)
- error (_("Not found: fork id %s"), args);
-
- linux_fork_context (fp, from_tty);
-}
-
-/* Switch inferior process (fork) context, by checkpoint id. */
+/* Switch inferior process (checkpoint) context, by checkpoint id. */
static void
restart_command (char *args, int from_tty)
{
{
init_fork_list ();
- /* Set/show detach-on-fork: user-settable mode. */
-
- add_setshow_boolean_cmd ("detach-on-fork", class_obscure, &detach_fork, _("\
-Set whether gdb will detach the child of a fork."), _("\
-Show whether gdb will detach the child of a fork."), _("\
-Tells gdb whether to detach the child of a fork."),
- NULL, NULL, &setlist, &showlist);
-
- /* Set/show restart-auto-finish: user-settable count. Causes the
- first "restart" of a fork to do some number of "finish" commands
- before returning to user.
-
- Useful because otherwise the virgin fork process will be stopped
- somewhere in the un-interesting fork system call. */
-
/* Checkpoint command: create a fork of the inferior process
and set it aside for later debugging. */
add_com ("checkpoint", class_obscure, checkpoint_command, _("\
Fork a duplicate process (experimental)."));
- /* Restart command: restore the context of a specified fork
- process. May be used for "program forks" as well as for
- "debugger forks" (checkpoints). */
+ /* Restart command: restore the context of a specified checkpoint
+ process. */
add_com ("restart", class_obscure, restart_command, _("\
restart <n>: restore program context from a checkpoint.\n\
Argument 'n' is checkpoint ID, as displayed by 'info checkpoints'."));
/* Delete checkpoint command: kill the process and remove it from
- fork list. */
+ the fork list. */
- add_cmd ("checkpoint", class_obscure, delete_fork_command, _("\
-Delete a fork/checkpoint (experimental)."),
+ add_cmd ("checkpoint", class_obscure, delete_checkpoint_command, _("\
+Delete a checkpoint (experimental)."),
&deletelist);
- /* Detach checkpoint command: release the process to run independently,
+ /* Detach checkpoint command: release the process to run independently,
and remove it from the fork list. */
- add_cmd ("checkpoint", class_obscure, detach_fork_command, _("\
-Detach from a fork/checkpoint (experimental)."),
+ add_cmd ("checkpoint", class_obscure, detach_checkpoint_command, _("\
+Detach from a checkpoint (experimental)."),
&detachlist);
- /* Info checkpoints command: list all forks/checkpoints
+ /* Info checkpoints command: list all forks/checkpoints
currently under gdb's control. */
- add_info ("checkpoints", info_forks_command,
- _("IDs of currently known forks/checkpoints."));
-
- /* Command aliases (let "fork" and "checkpoint" be used
- interchangeably). */
-
- add_alias_cmd ("fork", "checkpoint", class_obscure, 1, &deletelist);
- add_alias_cmd ("fork", "checkpoint", class_obscure, 1, &detachlist);
- add_info_alias ("forks", "checkpoints", 0);
-
- /* "fork <n>" (by analogy to "thread <n>"). */
- add_com ("fork", class_obscure, fork_command, _("\
-fork <n>: Switch between forked processes.\n\
-Argument 'n' is fork ID, as displayed by 'info forks'."));
-
- /* "process <proc id>" as opposed to "fork <fork id>". */
- add_com ("process", class_obscure, process_command, _("\
-process <pid>: Switch between forked processes.\n\
-Argument 'pid' is process ID, as displayed by 'info forks' or 'shell ps'."));
+ add_info ("checkpoints", info_checkpoints_command,
+ _("IDs of currently known checkpoints."));
}
projects / thirdparty / binutils-gdb.git / blobdiff